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Synergistic electronic and morphological modulation on ternary Co_(1-x)V_(x)P nanoneedle arrays for hydrogen evolution reaction with large current density

引用

Science China Materials 2021年第4期64卷 880-891页

作者： Mingyang Yang Chaoqun Shang Feifei Li Chen Liu Zhenyu Wang Shuai Gu Di Liu Lujie Cao Junjun Zhang Zhouguang Lu Hui Pan Department of Materials Science and Engineering Shenzhen Key Laboratory of Hydrogen EnergySouthern University of Science and TechnologyShenzhen 518055China Institute of Applied Physics and Materials Engineering University of MacaoMacao SARChina Shenzhen Key Laboratory of Polymer Science and Technology College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China International Academy of Optoelectronics at Zhaoqing South China Normal UniversityZhaoqing 526060China Department of Physics and Chemistry Faculty of Science and TechnologyUniversity of MacaoMacao SARChina

It is a great challenge to prepare non-noble metal electrocatalysts toward hydrogen evolution reaction(HER)with large current *** electronic and morphological structures of the catalyst have been considered as an effective method to improve the catalytic performance,due to the enhanced intrinsic activity and enlarged accessible active ***,we present novel ternary Co_(1-x)V_(x)P nanoneedle arrays with modulated electronic and morphological structures as an electrocatalyst for highly efficient HER in alkaline *** NF@Co1-xVxP catalyst shows a remarkable catalytic ability with low overpotentials of 46 and 226 mV at current densities of 10 and 400 mA cm^(-2),respectively,as well as a small Tafel slope and superior *** the experimental and computational study,the excellent catalytic performance was attributed to the improved physical and chemical properties(conductivity and surface activity),large active surface area,and fast reaction ***,the assembled Co–V based electrolyzer(NF@Co_(1-x)V_(x)–HNNs(+)||NF@Co_(1-x)V_(x)P(-))delivers small full-cell voltages of 1.58,1.75,and 1.92 V at 10,100,and 300 mA cm^(-2),*** findings provide a systematic understanding on the V–incorporation strategy to promote highly efficient ternary electrocatalysts via synergistic control of morphology and electronic structures.

关键词： modulated morphology and electronic structures ternary Co1-xVxP hydrogen evolution reaction overall water splitting

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